Write a MySQL query to get the difference between the highest and lowest salaries

MySQL String Functions – Exercises

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The following exercise will help you to improve your MySQL query skills effectively. I have used phpMyAdmin for the following Exercises.

– students

StudentId FirstName LastName Admission_fee Admission_date Branch
1 John Smith 1000 2018-06-10 Computer Engineering
2 David Jones 1200 2018-06-20 Civil Engineering
3 Michael Johnson 900 2018-08-15 Chemical Engineering
4 Chris Lee 1500 2018-07-10 Electrical Engineering
5 Mike Brown 1600 2018-09-10 Mechanical Engineering
6 Lisa Smith 1800 2018-07-10 Computer Engineering
7 Mary Smith 1600 2018-06-11 Computer Engineering
  1. Write a MySQL query to update the Branch number in the stuents table, where firstname = John
  2. Write a MySQL query to get details of the students where the length of the first name greater than or equal to 5
  3. Write a MySQL query to append ‘@example.com’ to firstname field
  4. Write a MySQL query to get the student id, first name and admission month
  5. Write a MySQL query to get the student id, email id (discard the last three characters)
  6. Write a MySQL query to find all students where first names are in upper case
  7. Write a MySQL query to find all students where first names are in lower case
  8. Write a MySQL query to extract the last 3 numbers from admission fees

 

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